Welding compound.



--compound which adheresto the wire.

STATES PATENT onmon. k

mnnnrcx a. 3mm am) LOUIS J. vsnco, or CLEVELAND, onto.

wan-Dime oomrcunn.

1,271,125; No Drawing. I

To all whom it may com-em:

Be it known that we,"FauDnr1oK G. Y Burma and LOUIS J Yanoo, citizens of the United States, residing'at Cleveland, in the 1 5 county of Cuyahoga and State of Ohio, have a v inventedfcertain new, and useful Improve ments in .Welding Compounds, of which the following isa specification. This invention relates to pounds, and has for its object to provide an improved compound suitable for use in welding metals of diiferent kind's or metals of o the same kind. For example, the compound will weld brass, steel or cast iron, either with *the same kind or with each other.

Thus brass and steel, or brass and cast iron,

or cast iron andsteel, among difierent metals may be welded, with j entirely satisfactory results, forming a permanent joint in any 'ioinstance. M

The compound c'onsistso the following ingredients, preferably in t e'proportions indicated':

2 Bicarbonate of sodaf 90% 5 I Boracic acid 9% Ultra-marine blu 1% The bicarbonate o'f-soda and boracic acid are ground and rolled into a fine powder and then thoroughly mixed with the blue.

'. the use of the'compound, the "two metals to be welded are first heated to about the fu- 'sion point, and 'thenwire preferably of the v at least oneof the a as metals to'be welded, isdipp'ed inthe dry 1 same kind and grade-of The a wire thus covered with the compound is placed in'contact-withthe-two surfaces to be welded, and the heat ofthe wel torch. 4'0 or the like is applied, toefiect'the we d.-

The chemical action is as follows: The

. boracic acid unites with the metallic -oxide which have been formed on the the heated metals, producing cle'anmctallic surfaces which' v weld. This dissolution of the oxide and Specification of Letters Patent.

welding com- -racicacid and sodium bicarbonate.

surfaces ofreadilyunite to form the production of clean metallic surfaces is essential to a good weld. At the temperature employed in the weld, the sodium bicarbonthe surfacesto be welded and the sodium bicarbonate acts to protect these clean surfaces from oxidation suiiiciently long to en able 9. perfect weld to be made.

The'action of the ultra-marine blue isnot fully understood, but tests show that it produces a more favorable action when present in the mixture than when .it'is absent, the

cause being obscure. It apparently serves to give a smoother finish to the joint, which may be hammered or pressed, as usual, during the operation. I

What we claim asnew is: :1. A soldering compound and another capable of producing a neutral envelop around the. surfaces being joined at atemperaturebelow the fusion point of the compound. I

2. A welding compound containing bo- '3L -A,wel compound cons of boracic acid, bicarbonate, an

stated.

natures in presence of two witnesses.

. FREDERICK G. BRAUND. LOUISJ. VABGO.

Jo'zm- A. Bommnm',

Patented July 2, 1918. Application filed Deccmber as, 1916. Serial No. 138,926, 1

comprising a 1 material capable'of dissolving metallic oxids ultramarine blue, m substantially the proportions In testimony'whereof, we do aflix our sig- 

